Roll paper chuck



' Oct. 20, 1936.

w. C. GEORGE ROLL PAPER CH Filed nec e, 1954 Inventor c go g By a "Ktt'y" Patented Oct. 20, 1936 UNITED STATES,

ROLL PAPER, cnUoK Walter 0. George, St.

Louis, Mo., assignor Robert Gaylord, Incorporated, St. Louis, Mo., v a corporation of Missouri s Application December 6, 1934, Serial 3 Claims.

My invention relates to a roll paper chuck and particularly to a chuck adapted to carry large and heavy rolls such, for example, as are used to supply to a corrugating machine the component sheets for forming corrugated fiberboard. It has been usual heretofore to support such rolls on a shaft having, adjacent its ends, a pair of conical members adapted to enter the bore of the'roll and engage with the ends of the inner layers of paper. The objection to this arrangement is that, owing to the small area of contact between the conical members and the roll, the ends of the inner layers of paper are frayed and torn away to such an extent as to cause a substantial waste of the paper stock. i

The object of my invention is to. provide simple and efiective means for securing engagement of the supporting means with the interior of the bore of'the roll throughout a substantial area, thus preventing appreciable loss of stock by fraying.

In the accompanying drawing, which illustrates one formbf my device, Figure 1 is a side view; Figure 2 is an enlarged longitudinal section through one of the chuck'members; Figure 3 is a fragmentary view similar to Figure 2 but showing the parts in expanded position; and Figure 4 is a section taken on the line 44 of Figure 2, and Figure 5 is a section'taken on the line 55 of Figure 2.

The numeral .5 indicates the supporting shaft journaled at its ends insuitable bearings (not shown). The shaft is provided with a key-way 6 and has mounted upon it, adjacent to each end, a pair of chuck members for engaging with the bore of the paper roll, such members being of the same construction.

The body of each chuck member consists of a sleeve 1 provided adjacent its outer end with external threads 8 and having a reduced inner end 9. Mounted on the reduced inner end of the sleeve are a fixed collar 1 0 and a sliding collar II-. The collar [0 may be secured in position by pins 22. Each of thecollars are provided with a plurality of pockets having inclined inner ends l2. Seated in the pockets are expansion bars l3 having their'ends beveled-to correspond with the angle of the ends l2. These bars are held in their retracted position by elastic bands ll, preferably of rubber. Positioned between the outer end of the sliding collar ll and the shoulder l5, formed between the main and reduced parts of the sleeve, is a washer [6, preferably ofbronze or similar bearing metal. Carried on the washer is a flange l1 extending beyond the periphery of the threaded portion 'of the sleeve. This projecting flange No. 756,370 (c1. e m-"12) is engaged by the'faceofanut I 8 internally threaded to cooperate with the threads 8. Any suitable means is provided for rotating the nut l8, such as radial holes [9, for engagement with an operating bar. The numeral indicates a key carried bythe sleeve and engaging with the keyway 6 in the shaft to prevent relative rotary movement between these parts but to permit longitudinal movement of the, sleeve on the shaft. To lock the sleeve against longitudinal movement after the desired adjustment has been made, it is provided with a set-screw 2i. This set-screw is preferably arranged in alignment with the key so as to cooperate with the bottom of the keyway and thus prevent burring of the shaft with consequent binding of the sleeve thereon. The key 20, in addition to preventing rotation of the sleeve on the shaft, also engageswith a way in the collar H to prevent'its rotation on the sleeve. In using my device one of the chuck members isremoved from the shaft and the shaftpassed through the bore of thepaper roll until the other chuck member enters the bore and the end of the roll is adjacent to but out of contact with the flange [1. I The first named chuck member is now replaced on the shaft andsimilarly positioned with respect to the roll. Both ,chuck'members are now locked againstlongitudinal movement by means of the set-screws and the nuts 18 rotated to force the sliding collars ll toward. the fixed collars H), as shown in Figure 3. This forces the expansion bars |3=.outwardly, causing them to engage effectively with the inner periphery of-the bore and so firmly clamp the roll in position on the shaft without injury to the stock.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is: v

1. In a device of the class described, the combination with a shaft having a key-waver a sleeve on said shaft having a key engaging said key-way, said sleeve having a main threaded portion and a reduced portion, a fixed collar on said reduced portion adjacent its inner end, a sliding collar on said reduced portion adjacent its outer end, each of said collars being provided with pockets having inclined walls, expansion bars positioned in said pockets and having inclined ends cooperating with the inclined walls of said pockets, elastic meansfor holding said bars in retracted position, 50 a washer abutting the sliding collar'and projecting radially beyond the threaded portion, a nut on the threaded portion for actuating said washer to move the sliding collar in the direction of the length of the shaft, and means for locking the 55 shaft.

2. In a device of the class described, the combination with a shaft having a key-way, of a sleeve on said shaft, a fixed collar on said sleeve, a slidmg collar on said sleeve, each of said collars being provided with pockets having inclined walls, ex-

pansion bars positioned in said pockets and having inclined ends cooperating with the inclined walls of the pockets, a key carried by the sleeve,

said key engaging with the way in the shaft to prevent rotation of the sleeve on the shaft and with the sliding collar to prevent rotation of the collar on the sleeve, and means for locking the i5 sleeve against longitudinal movement 01' the shaft.

3. In a device of the class described. the combi- 2,058,224 sleeve against longitudinal movement on the nation with a shaft having a key-way, of a sleeve on said shaft having a key engaging said key-way, said sleeve having a threaded and a non-threaded portion, a fixed collar on said sleeve adjacent its inner end, a sliding collar on the non-threaded portion of said sleeve, each of said collars being provided with pockets having inclined walls, expansion bars positioned in said pockets and having inclined ends cooperating with the inclined walls of said pockets, elastic means for holding said bars in retracted position, a nut on the threaded portion of the sleeve to actuate the sliding collar, and means for locking the sleeve against longitudinal movement on the shaft.

WALTER C. GEORGE. 

